Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7cb79be2e6d70c0…

MALICIOUS

PDF

46.6 KB Created: 2020-10-02 14:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 285939cbb24f7c7e83860d3b8c8352eb SHA-1: ee5799bd6ccffcef2bdd3a640d28985afd48c399 SHA-256: f7cb79be2e6d70c0b7e1ce69aab9da1509f3619baf006298eeed59df76e493fe
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=free+typing+games+.zone In PDF document text
    • http://kizotobap.surveyofps2.net/uploads/1/3/1/3/131383309/fojoxogeb-tunegimazu-ruvovikesufu.pdfIn PDF document text
    • http://files.inspireinternationalseychelles.com/uploads/1/3/0/7/130776208/xokovokonitalen.pdfIn PDF document text
    • https://site-1036884.mozfiles.com/files/1036884/zinopejubo.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/9921550580.pdfIn PDF document text
    • https://site-1040097.mozfiles.com/files/1040097/fotapesizofegawikusi.pdfIn PDF document text
    • https://site-1040869.mozfiles.com/files/1040869/bomafuxule.pdfIn PDF document text
    • https://site-1036861.mozfiles.com/files/1036861/80396634943.pdfIn PDF document text
    • http://files.ustercollageart.com/uploads/1/3/0/9/130969992/wozonefaz.pdfIn PDF document text
    • http://files.bendfarmersmarket.com/uploads/1/3/0/7/130739625/vimunawuliwejo-tusuf-papikegekenug.pdfIn PDF document text
    • http://files.fashinfidelity.com/uploads/1/3/2/7/132741385/tojumigedibawuta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0829/8655/files/definite_integrals_worksheet_doc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5232/9888/files/blackberry_simple_syrup_cocktail.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/bometozezuwiwufofof.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7805 5244 bytes
SHA-256: 7d0c2601b6f28f07e2af57de16a57a7186afb0888f5a9c6f0d8ede6b20e92d38
font_01_sfnt_off000089e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E6 10652 bytes
SHA-256: 3c523021033933bdb0605905ea2785602df28bd2f9853d20a9ca3b6cc73fb60f